Digital Sundial originally by Majoptix, modified by aolshove on Thingiverse, and further modified by me to show only :00 and :30 for the minutes.

Prusa Mk3S: 0.15mm resolution, 0.4mm nozzle, Devil Design Green ASA. Print time 12½ hours.

More Robust Digital Sundial Stand by CrackBaron on Thingiverse.

Prusa Mk3S: 0.2mm resolution, 0.4mm nozzle, Devil Design Green ASA. Print time 12¾ hours.